18202018193 has 2 divisors, whose sum is σ = 18202018194. Its totient is φ = 18202018192.

The previous prime is 18202018181. The next prime is 18202018253. The reversal of 18202018193 is 39181020281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17800095889 + 401922304 = 133417^2 + 20048^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18202018193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18202018123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9101009096 + 9101009097.

It is an arithmetic number, because the mean of its divisors is an integer number (9101009097).

Almost surely, 2^18202018193 is an apocalyptic number.

It is an amenable number.

18202018193 is a deficient number, since it is larger than the sum of its proper divisors (1).

18202018193 is an equidigital number, since it uses as much as digits as its factorization.

18202018193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 18202018193 in words is "eighteen billion, two hundred two million, eighteen thousand, one hundred ninety-three".